Improvement in paper-cutting machinery



itrd States aient (tithe.

Laim Puma No. 91,742, camz Jane 22, 1869.

IMPROVEMENT IN PAPER-CUTTIN G- MACHINERY.

The Schedule referred to in these Letters Patent and making partof the same.

To all whom 1t/may concern:

Be it known that I, JONATHAN HATCH, of South Windham, in the county of Windham, and State of Connecticut, have invented a new and useful Improvement in Machines for Outtingl-aper, of which the following is a full, clear, and exact description, reference being had to the accompanying drawing, forming part of this specification, and in which- Figure 1 represents a front elevation of a paper-cutting machine constructed in accordance with my improvement, and

Figures 2 and 3, vertical transverse sections of the same, looking in opposite directions.

'Similar letters` of reference indicate corresponding parts.

My invention consists in a combination of a revolving knife with a bed-knife or cutter, made to reciprocate in line of the feed of; the paper past it, while, or as the revolving knife has asimilar `or independent motion given it in addition to its rotation around its own axis, said revolving knifebeing always in gear, whether run forward or backward, and travelling at a varying velocity, but the-speed of the knives -in the act of cutting being always in conformity with'the feed of the papel'.

Also, the invention consists incertain means for producing these several motions to the knives in a timely and advantageous manner relatively to the feeding-in rolls.

By this, my invention, the paper, during a continnous feed of it, may be cut up into sheets perfectly square, relatively to the feed, no matter what the length of the sheets, without varying the oblique set of the knife or knives, and a much smaller revolving knife be used than -where the bed-knife is stationary.

lhe feed of the paper also is kept unifbrm,and by the concerted falling action of the revolving knife with the hed-knife in cutting, due to the motion given it, which is additional toits axial rot-ation, but a small fall of the bed-knife is necessary when cutting the paper into sheets of Vconsiderable length or size.

In previous rot( ting cutter and continuons-feed arrangements, it` has been necessary to change the oblique set of knives, to adapt them to sheets or cuts of diiferent length, in order to secure a square out being made. This, on account of the loss and delay consequent upon such change, is seldom done; hence thev paper is allowed to go to market out of square, which affects the registering when printing on both sides of the sheet, and is especially objectionable in book-work.

In other or stop-cutter arrangements, this difficulty is removed, but at the expense of stopping the machine during the cut, which exposes said machine to great strian and wear and tear, owing to the frequency with which it has to be stepped and started, often amounting to thirty or forty times a minute, and the heavy load it has to carry, with the paper drawn tight to prevent wrinkling.

Referring to the accompanying drawing- A B represent the usual feeding-in rolls of a papercutting machine, and

AC, the revolving knife-cylinder or roll, carrying on its periphery a knife, S, which. may beset at considerable Obliquity to effect an easy draw-cut.

This revolving knife-cylinder, roll, 0r stock, is hung to rotate in arms D D, hung loose on a shaft, E, which has fixed bearings, and is rotated by spur-wheels F G, from or through the feeding-in roll A.

On thisshaft E is a pinion, H, which gears with a pinion, I, on the knife-cylinder, that is, accordingly, not only made to revolve onor around its own axis, but to have a motion around the pinion H as a centre, as will hereinafter be more fully explained.

`J is the bed-knife, the stock of which is attached in an adjustable manner, relatively to the rotating knife,

by screws, nuts, and springs l) c, to the front ends or' portions of the arms D D.

These arms, which, with the rotating knife-cylinder and bed-knife carried by them, swing on the shaft E, may be balanced, and have their necessary `swinging or rocking motion given to them in both or opposite directions in a positive manner, but are here shown as driven in the one direction of their swing only, and as falling or returning by the weight of the revolving and bed-knives in the other direction.

Thus on the shaft E is a wheel, K, ivhich gears with a wheel, L, on a shaft, M, that carries cams N N, which act upon rollers d d attached to levers 0.0, pivoted as at e e, and connected at their free ends by link-rods P P to the back ends vor portions of the arm-s D D.

By this mode of driving and suspension of the revolving and bed-knives S and J, the rotating knife S has a quickened volocity when making the cut, due to its travel in a downward direction around the pinion H as a centre, in addition to its rotation on its ownaxis or that of its cylinder C, and a slower or retarded velocity in its back run, but both it and the bed-knife J, in falling fro'mthe` pinion H as a centre of motion, travel only at the velocity ofthe feed of the paper down in between them, so that there is no drag ou the paper; and, inasmuch as both knives fall with the paper during the cut, the paper, no matter what the width or length of the sheets, is necessarily cut square without altering the Obliquity of the knife.

In cutting sheets of a different length, the revolving knife S will require to be driven faster or slower, according to the length of the sheet. l'lhis may be done by suitably' changing the gears F and G, and this necessarily, by the quicker or slower motion given to the shaft E, quickens or retards 'the motion of the cams N N, alteration in the velocity of vwhich would aect the falling motion of the knives S and J relatively1 to the feed of the paper, and as it is important that this falling motion from the pinion H, as a centre, which takes place during the ent, should be in exact accordance with the feed of the paper, I lengthen or slierten, as required, the operating-leverage of the hack portions of the arms D D, by makin/gnhe link-rods P P adjustable along the arms D D through a series oi' holes, f, made therein. In this way, or by other equivalent means, the knives in falling are adjusted to travel with the speed of the paper.

What is here elaimed, and desired to be secured by Letters Patent, is-

1. The combination ofthe bed-knife J, arranged to reciprocate in direction of the feed or run of the peper, with the revolving knife S, having, in addition to rotation around its axis, a like reciprocating movement, and so that in effecting the ont, both knives travel with the paper at the speed of the latter, substantially as specified.

2. The revolving knife-cylinder, or stock C, hung in the other is free to move around the first that oper-v ates as a driver, in combination with a. counter-knife,

or hed, essentially as shown and described.

3. The :combination of the bed-knife J and revolving knife S, with the swinging arms D D and'pinions H and I, arranged relatively to the shaft- E, substantially as specified. i

4. 'lhe combination, with the feeding-in rolls A and B and knives S and J, hung to operate as described, ot' the cams N N and levers O 0, connected, in an adjustable manuel', with the Stringing arms D D, to regnlate the fall of the knives tothe speed of the paper, essentially as herein set forth.

JONATHAN HATCH.

Witnesses:

A. S. WINCHESTER, L. C. KINNE. 

